The objectives of this research discussed the influence on mechanical properties of Engineered Cementitious Composites (ECC) using slag. Including pressure, tensile and flexural properties. The results show that using slag can improve the ECC compressive strength, and retain characteristic of strain hardening and multiple cracking. Age of 28 days, the compressive strength is up to 75MPa, the maximum tensile strain can exceed 1%. When slag content increased, compressive strength, maximum tensile stress and ultimate flexural stress will be slight decline, but still higher than fly ash ECC.
Finally, the investigation into the self-healing capacities of ECC specimens. In tensile test, surface crack width observation and scanning electron microscope (SEM) to observe and compare the degree of selfhealing with two different degrees of pre-crack (0.5% and 1.0%) and three different storage environments (water, sulfate solution and substitute ocean water). The results show, specimens has self-healing behavior regardless of storage in the water or under the harsh environment.